My 97 GTX runs great for 30 minutes then it shuts down like the key is coming off the dess post. I get two beeps when I re-attach the key but the starter just spins very quietly and does not engage. I pressed the start/stop button 5 times with the key off and the display said High Temp. I let the engine cool for about 15 minutes and it did start. It ran for another 5 minutes and then shut down again. Could it be as simple as a bad heat sensor?